Simulink Control Design™ - MathWorks

• Large enough that the perturbation overcomes any deadband in the plant actuator and
  generates a response above the noise level


• Small enough to keep the plant running within the approximately linear region near
  the nominal operating point, and to avoid saturating the plant input or output

When Experiment mode is Superposition, the sinusoidal signals are superimposed with

no phase shift. Thus, the maximum perturbation can exceed the amplitude of any

individual component, up to the sum of all amplitudes. Make sure that the largest possible

perturbation is within the range of your plant actuator. Saturating the actuator can

introduce errors into the estimated frequency response.

Tip

This parameter is not tunable. To provide amplitudes after deployment, set Excitation

Signal Source to External ports and use the amp input port. For more information, see

“Deploy Frequency Response Estimation Algorithm for Real-Time Use” on page 6-11.

Dependencies

To enable this parameter, set Excitation Signal Source to Block parameters.

Programmatic Use

Block Parameter: Amplitudes

Type: scalar, vector

Default: '1'

Number of frequencies in the excitation signal — Number of externally

supplied frequencies

3 (default) | positive integer

When you provide the experiment frequencies via the external port w, specify the number

of frequencies (the length of the vector signal at w) with this parameter.

Dependencies

To enable this parameter, set Excitation Signal Source to External ports.

Programmatic Use

Block Parameter: NumOfFreq

Type: scalar

Default: '3'

Experiment mode — Experiment mode

Sinestream (default) | Superposition

16 Blocks — Alphabetical List